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8#include <linux/clk.h>
9#include <linux/clk-provider.h>
10#include <linux/console.h>
11#include <linux/io.h>
12#include <linux/mfd/syscon.h>
13#include <linux/mm.h>
14#include <linux/module.h>
15#include <linux/of_platform.h>
16#include <linux/platform_device.h>
17#include <linux/pm.h>
18#include <linux/pm_runtime.h>
19#include <linux/regmap.h>
20
21#include <drm/drmP.h>
22#include <drm/drm_atomic_helper.h>
23#include <drm/drm_fb_cma_helper.h>
24#include <drm/drm_fb_helper.h>
25#include <drm/drm_gem_cma_helper.h>
26#include <drm/drm_modeset_helper.h>
27#include <drm/drm_probe_helper.h>
28
29#include "fsl_dcu_drm_crtc.h"
30#include "fsl_dcu_drm_drv.h"
31#include "fsl_tcon.h"
32
33static int legacyfb_depth = 24;
34module_param(legacyfb_depth, int, 0444);
35
36static bool fsl_dcu_drm_is_volatile_reg(struct device *dev, unsigned int reg)
37{
38 if (reg == DCU_INT_STATUS || reg == DCU_UPDATE_MODE)
39 return true;
40
41 return false;
42}
43
44static const struct regmap_config fsl_dcu_regmap_config = {
45 .reg_bits = 32,
46 .reg_stride = 4,
47 .val_bits = 32,
48
49 .volatile_reg = fsl_dcu_drm_is_volatile_reg,
50};
51
52static void fsl_dcu_irq_uninstall(struct drm_device *dev)
53{
54 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
55
56 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, ~0);
57 regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
58}
59
60static int fsl_dcu_load(struct drm_device *dev, unsigned long flags)
61{
62 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
63 int ret;
64
65 ret = fsl_dcu_drm_modeset_init(fsl_dev);
66 if (ret < 0) {
67 dev_err(dev->dev, "failed to initialize mode setting\n");
68 return ret;
69 }
70
71 ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
72 if (ret < 0) {
73 dev_err(dev->dev, "failed to initialize vblank\n");
74 goto done;
75 }
76
77 ret = drm_irq_install(dev, fsl_dev->irq);
78 if (ret < 0) {
79 dev_err(dev->dev, "failed to install IRQ handler\n");
80 goto done;
81 }
82
83 if (legacyfb_depth != 16 && legacyfb_depth != 24 &&
84 legacyfb_depth != 32) {
85 dev_warn(dev->dev,
86 "Invalid legacyfb_depth. Defaulting to 24bpp\n");
87 legacyfb_depth = 24;
88 }
89
90 return 0;
91done:
92 drm_kms_helper_poll_fini(dev);
93
94 drm_mode_config_cleanup(dev);
95 drm_irq_uninstall(dev);
96 dev->dev_private = NULL;
97
98 return ret;
99}
100
101static void fsl_dcu_unload(struct drm_device *dev)
102{
103 drm_atomic_helper_shutdown(dev);
104 drm_kms_helper_poll_fini(dev);
105
106 drm_mode_config_cleanup(dev);
107 drm_irq_uninstall(dev);
108
109 dev->dev_private = NULL;
110}
111
112static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
113{
114 struct drm_device *dev = arg;
115 struct fsl_dcu_drm_device *fsl_dev = dev->dev_private;
116 unsigned int int_status;
117 int ret;
118
119 ret = regmap_read(fsl_dev->regmap, DCU_INT_STATUS, &int_status);
120 if (ret) {
121 dev_err(dev->dev, "read DCU_INT_STATUS failed\n");
122 return IRQ_NONE;
123 }
124
125 if (int_status & DCU_INT_STATUS_VBLANK)
126 drm_handle_vblank(dev, 0);
127
128 regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
129
130 return IRQ_HANDLED;
131}
132
133DEFINE_DRM_GEM_CMA_FOPS(fsl_dcu_drm_fops);
134
135static struct drm_driver fsl_dcu_drm_driver = {
136 .driver_features = DRIVER_GEM | DRIVER_MODESET
137 | DRIVER_PRIME | DRIVER_ATOMIC,
138 .load = fsl_dcu_load,
139 .unload = fsl_dcu_unload,
140 .irq_handler = fsl_dcu_drm_irq,
141 .irq_preinstall = fsl_dcu_irq_uninstall,
142 .irq_uninstall = fsl_dcu_irq_uninstall,
143 .gem_free_object_unlocked = drm_gem_cma_free_object,
144 .gem_vm_ops = &drm_gem_cma_vm_ops,
145 .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
146 .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
147 .gem_prime_import = drm_gem_prime_import,
148 .gem_prime_export = drm_gem_prime_export,
149 .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
150 .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
151 .gem_prime_vmap = drm_gem_cma_prime_vmap,
152 .gem_prime_vunmap = drm_gem_cma_prime_vunmap,
153 .gem_prime_mmap = drm_gem_cma_prime_mmap,
154 .dumb_create = drm_gem_cma_dumb_create,
155 .fops = &fsl_dcu_drm_fops,
156 .name = "fsl-dcu-drm",
157 .desc = "Freescale DCU DRM",
158 .date = "20160425",
159 .major = 1,
160 .minor = 1,
161};
162
163#ifdef CONFIG_PM_SLEEP
164static int fsl_dcu_drm_pm_suspend(struct device *dev)
165{
166 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
167 int ret;
168
169 if (!fsl_dev)
170 return 0;
171
172 disable_irq(fsl_dev->irq);
173
174 ret = drm_mode_config_helper_suspend(fsl_dev->drm);
175 if (ret) {
176 enable_irq(fsl_dev->irq);
177 return ret;
178 }
179
180 clk_disable_unprepare(fsl_dev->clk);
181
182 return 0;
183}
184
185static int fsl_dcu_drm_pm_resume(struct device *dev)
186{
187 struct fsl_dcu_drm_device *fsl_dev = dev_get_drvdata(dev);
188 int ret;
189
190 if (!fsl_dev)
191 return 0;
192
193 ret = clk_prepare_enable(fsl_dev->clk);
194 if (ret < 0) {
195 dev_err(dev, "failed to enable dcu clk\n");
196 return ret;
197 }
198
199 if (fsl_dev->tcon)
200 fsl_tcon_bypass_enable(fsl_dev->tcon);
201 fsl_dcu_drm_init_planes(fsl_dev->drm);
202 enable_irq(fsl_dev->irq);
203
204 drm_mode_config_helper_resume(fsl_dev->drm);
205
206 return 0;
207}
208#endif
209
210static const struct dev_pm_ops fsl_dcu_drm_pm_ops = {
211 SET_SYSTEM_SLEEP_PM_OPS(fsl_dcu_drm_pm_suspend, fsl_dcu_drm_pm_resume)
212};
213
214static const struct fsl_dcu_soc_data fsl_dcu_ls1021a_data = {
215 .name = "ls1021a",
216 .total_layer = 16,
217 .max_layer = 4,
218 .layer_regs = LS1021A_LAYER_REG_NUM,
219};
220
221static const struct fsl_dcu_soc_data fsl_dcu_vf610_data = {
222 .name = "vf610",
223 .total_layer = 64,
224 .max_layer = 6,
225 .layer_regs = VF610_LAYER_REG_NUM,
226};
227
228static const struct of_device_id fsl_dcu_of_match[] = {
229 {
230 .compatible = "fsl,ls1021a-dcu",
231 .data = &fsl_dcu_ls1021a_data,
232 }, {
233 .compatible = "fsl,vf610-dcu",
234 .data = &fsl_dcu_vf610_data,
235 }, {
236 },
237};
238MODULE_DEVICE_TABLE(of, fsl_dcu_of_match);
239
240static int fsl_dcu_drm_probe(struct platform_device *pdev)
241{
242 struct fsl_dcu_drm_device *fsl_dev;
243 struct drm_device *drm;
244 struct device *dev = &pdev->dev;
245 struct resource *res;
246 void __iomem *base;
247 struct drm_driver *driver = &fsl_dcu_drm_driver;
248 struct clk *pix_clk_in;
249 char pix_clk_name[32];
250 const char *pix_clk_in_name;
251 const struct of_device_id *id;
252 int ret;
253 u8 div_ratio_shift = 0;
254
255 fsl_dev = devm_kzalloc(dev, sizeof(*fsl_dev), GFP_KERNEL);
256 if (!fsl_dev)
257 return -ENOMEM;
258
259 id = of_match_node(fsl_dcu_of_match, pdev->dev.of_node);
260 if (!id)
261 return -ENODEV;
262 fsl_dev->soc = id->data;
263
264 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
265 base = devm_ioremap_resource(dev, res);
266 if (IS_ERR(base)) {
267 ret = PTR_ERR(base);
268 return ret;
269 }
270
271 fsl_dev->irq = platform_get_irq(pdev, 0);
272 if (fsl_dev->irq < 0) {
273 dev_err(dev, "failed to get irq\n");
274 return fsl_dev->irq;
275 }
276
277 fsl_dev->regmap = devm_regmap_init_mmio(dev, base,
278 &fsl_dcu_regmap_config);
279 if (IS_ERR(fsl_dev->regmap)) {
280 dev_err(dev, "regmap init failed\n");
281 return PTR_ERR(fsl_dev->regmap);
282 }
283
284 fsl_dev->clk = devm_clk_get(dev, "dcu");
285 if (IS_ERR(fsl_dev->clk)) {
286 dev_err(dev, "failed to get dcu clock\n");
287 return PTR_ERR(fsl_dev->clk);
288 }
289 ret = clk_prepare_enable(fsl_dev->clk);
290 if (ret < 0) {
291 dev_err(dev, "failed to enable dcu clk\n");
292 return ret;
293 }
294
295 pix_clk_in = devm_clk_get(dev, "pix");
296 if (IS_ERR(pix_clk_in)) {
297
298 pix_clk_in = fsl_dev->clk;
299 }
300
301 if (of_property_read_bool(dev->of_node, "big-endian"))
302 div_ratio_shift = 24;
303
304 pix_clk_in_name = __clk_get_name(pix_clk_in);
305 snprintf(pix_clk_name, sizeof(pix_clk_name), "%s_pix", pix_clk_in_name);
306 fsl_dev->pix_clk = clk_register_divider(dev, pix_clk_name,
307 pix_clk_in_name, 0, base + DCU_DIV_RATIO,
308 div_ratio_shift, 8, CLK_DIVIDER_ROUND_CLOSEST, NULL);
309 if (IS_ERR(fsl_dev->pix_clk)) {
310 dev_err(dev, "failed to register pix clk\n");
311 ret = PTR_ERR(fsl_dev->pix_clk);
312 goto disable_clk;
313 }
314
315 fsl_dev->tcon = fsl_tcon_init(dev);
316
317 drm = drm_dev_alloc(driver, dev);
318 if (IS_ERR(drm)) {
319 ret = PTR_ERR(drm);
320 goto unregister_pix_clk;
321 }
322
323 fsl_dev->dev = dev;
324 fsl_dev->drm = drm;
325 fsl_dev->np = dev->of_node;
326 drm->dev_private = fsl_dev;
327 dev_set_drvdata(dev, fsl_dev);
328
329 ret = drm_dev_register(drm, 0);
330 if (ret < 0)
331 goto put;
332
333 drm_fbdev_generic_setup(drm, legacyfb_depth);
334
335 return 0;
336
337put:
338 drm_dev_put(drm);
339unregister_pix_clk:
340 clk_unregister(fsl_dev->pix_clk);
341disable_clk:
342 clk_disable_unprepare(fsl_dev->clk);
343 return ret;
344}
345
346static int fsl_dcu_drm_remove(struct platform_device *pdev)
347{
348 struct fsl_dcu_drm_device *fsl_dev = platform_get_drvdata(pdev);
349
350 drm_dev_unregister(fsl_dev->drm);
351 drm_dev_put(fsl_dev->drm);
352 clk_disable_unprepare(fsl_dev->clk);
353 clk_unregister(fsl_dev->pix_clk);
354
355 return 0;
356}
357
358static struct platform_driver fsl_dcu_drm_platform_driver = {
359 .probe = fsl_dcu_drm_probe,
360 .remove = fsl_dcu_drm_remove,
361 .driver = {
362 .name = "fsl-dcu",
363 .pm = &fsl_dcu_drm_pm_ops,
364 .of_match_table = fsl_dcu_of_match,
365 },
366};
367
368module_platform_driver(fsl_dcu_drm_platform_driver);
369
370MODULE_DESCRIPTION("Freescale DCU DRM Driver");
371MODULE_LICENSE("GPL");
372
